JPH0674554A - Circulation pump control device for bath water purifying device - Google Patents

Abstract

PURPOSE:To prevent the temperature rise of hot water from exceeding a specified value by switching over the operation of a circulation pump from continuous mode to intermittent mode when it is determined that the heat generation of the circulation pump is attributable to the rise in the hot water after the bath water temperature has exceeded a setting value and a heat insulation heater is turned off. CONSTITUTION:A bath water purifying device is designed to circulate and purify the bath water in a bath tub by way of a circulation passage which includes a filter device or a heat insulation heater by driving a circulation pump 8. In this case, a memory device 2 stores a setting temperature of hot water set by a user by means of a hot water temperature setting instrument. A hot water temperature detection device 3 detects the temperature of hot water in a bath tub. A differential temperature determinant device 4 determines a differential temperature between a detected temperature and setting temperature and outputs an ON signal when the differential temperature is within the range of a specified plus value. A differential temperature stability determinant 5 determines whether or not the output of the ON signal continues only for a specified time. As a result, when the signal is continued, a circulation pump drive device 9 switches over the operation of the circulation pump from continuous operation mode to intermittent operation mode, thereby reducing the heat produced by the circulation pump 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to operation control of a circulation pump of a bath water purifier, and more particularly to temperature control of bath water by operation control of a circulation pump.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, there has been proposed a bath water purifying apparatus 20 including a control unit 16 and a purifying unit 17. Although not shown, the control unit 16 includes the bath water purification device 2
Input section for setting 0 operating conditions, setting conditions,
The purification unit 1 includes a display unit that displays various types of information such as operating conditions.
The controller 7 receives the outputs of various sensors such as the hot water temperature detecting means from 7 and controls them as a whole.

Purification unit 17 controlled by control unit 16
The circulation pump 13 causes the bath water in the bathtub 10 to flow from the suction side 11 of the circulation path for the circulation pump 13 to the filtration device 1.
2, circulation pump 13, warming heater 14 and sterilizer 1
Circulate through the discharge side 11 'of the circulation path through 5 etc.,
It keeps the bath water warm and removes dirt from the bath water for purification.

In the conventional example, the warming control of the bath water according to the set value of the bath water purifying apparatus is performed by comparing the detected hot water temperature value of the bath water with the set hot water temperature value to control ON / OFF of the warming heater. Was going by.

[0005]

In order to raise the bath water to the set hot water temperature by the bath water purifying device, the heat retention heater is turned on.
You can do it. However, since there is no device for lowering the hot water temperature, the bath water reaches the set hot water temperature in the bathroom with excellent heat retention performance, especially in the summer, and the heat retention heater turns off.
Even after reaching F, there was a problem that the hot water temperature value of the bath water gradually exceeded the set hot water temperature value due to the heat generated by the continuous operation of the circulation pump for circulating the bath water.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the conventional example, the present invention turns off the heat retention heater in the bath water purifying apparatus when the bath water temperature value reaches the set bath temperature value. After that, the difference between the hot water temperature value of the bath water and the set hot water temperature value is judged within the range of a predetermined plus value by the time that the state continues, and the temperature rise of the hot water temperature is caused by the heat generation of the circulation pump. If it is determined that it is due to the heat generation of the circulation pump, the circulation pump is switched from the continuous operation to the intermittent operation to reduce the heat generation from the circulation pump. After the bath water reaches the set hot water temperature value, it is possible to prevent the hot water temperature value of the bath water from gradually increasing beyond the set hot water temperature value due to the heat generated by the continuous operation of the circulation pump.

[0007]

According to the present invention, after the hot water temperature value of the bath water reaches the set hot water temperature value and the heat retention heater is turned off, whether the temperature rise of the hot water temperature value of the bath water is due to the heat generation of the circulation pump. If it is determined that the heat is generated by the circulation pump, the circulation pump is switched from the continuous operation to the intermittent operation to reduce the heat generation from the circulation pump. After the bath water reaches the set hot water temperature value, there is an effect that it is possible to prevent the hot water temperature value of the bath water from gradually rising beyond the set hot water temperature value due to the heat generated by the continuous operation of the circulation pump.

Secondly, since the operation control of the circulation pump is carried out by judging whether or not the temperature rise of the bath water temperature value is caused by the heat generation of the circulation pump, the user can, for example, reheat. , When the bath water is heated, the hot water temperature rises faster than when the circulation pump generates heat, so the circulation pump does not switch from continuous operation to intermittent operation, and the continuous operation of the circulation pump is preferable. It has the effect of purifying bath water.

[0009]

【Example】

(1) Configuration of Bath Water Purification Device First, the configuration of the bath water purification device of the present invention will be described with reference to FIG. In the figure, the hot water temperature setting device 1 is
This is to set the hot water temperature desired by the user. Storage device 2 stores the set hot water temperature value set by hot water temperature setting device 1. The hot water temperature detection device 3 is a device that detects the hot water temperature of the bath water.

In the temperature difference determination device 4, the temperature difference between the hot water temperature value of the bath water detected by the hot water temperature detection device 3 and the set hot water temperature value stored in the storage device 2 is a certain plus value set in advance. A device for determining whether the value is within the range of values, outputs an ON signal when the value is within the range, and outputs an OFF signal when the value is not within the range.

Temperature difference stability determination device 5 (hereinafter, the stability determination device 5 is determined by the temperature difference determination device 4 that the temperature difference is within a predetermined plus value range, and
It is a device that starts measuring time when receiving an N signal and determines whether the output of the ON signal continues for a preset time.

The circulation pump control device 6 is a device for controlling the continuous operation or the intermittent operation of the circulation pump 8 for circulating the bath water through the circulation pump drive device 7 according to the determination of the stability determination device 5. The circulation pump control device 6 and the circulation pump drive device 7 constitute a circulation pump operation device 9.

(2) Description of Operation Next, the operation of the bath water purifying apparatus will be described with reference to FIG. In the figure, Sn (n = 1, 2, 3, ...
・) Indicates each processing step of control.

S1 and S2 When changing the set hot water temperature value, the user changes and sets the hot water temperature setting value in the hot water temperature setting device 1 in S2. The set hot water temperature value is stored in the storage device 2. If the set hot water temperature value is not changed, the process proceeds to S3. The set hot water temperature value in this case is a value that has already been set or a default value that is preset by the device and is stored in the storage device 2.

In S3, the temperature difference determining device 4 subtracts the set hot water temperature value stored in the storage device 2 from the hot water temperature value detected by the hot water temperature detecting device 3, and the temperature difference is a preset positive value. Determine if it is within the range. If it is within this range, the process proceeds to S4, and if it is not within the range, the process proceeds to S5.

S4 to S6 When the temperature difference is within the range, the temperature difference determination device 4 outputs an ON signal to the stability determination device 5, and the temperature difference stability determination device 5 receiving the ON signal changes the time. Start measurement, S4
When it is determined that the ON signal has continued for a preset time in step S6, the flow proceeds to step S6, and in step S6, the circulation pump that has been continuously operating is switched to intermittent operation.

When there is no ON signal from the temperature difference judging device 4, or when the ON signal does not continue for a preset time, the stability judging device 5 does not start the time measurement or during the measurement. If there is, the measurement of the time is stopped, the process proceeds to S5, and the circulation pump operating device 9 is instructed to continuously operate the circulation pump 8 to continuously operate the circulation pump 8.

As described above, after the hot water temperature value of the bath water reaches the set hot water temperature value, the difference between the detected hot water temperature value and the set hot water temperature value falls within the range of a preset plus value. If there is a certain state and the state continues for a preset time, it is determined that the increase in the hot water temperature value is due to the heat generation due to the continuous operation of the circulation pump, and the intermittent operation of the circulation pump is performed. The circulation pump will not be switched to the intermittent operation due to reheating or the like.

The duty ratio for intermittent operation and stop of the circulation pump can be set to be optimum depending on the bathroom condition and season, and the temperature difference determination device 4 and the stability determination device 5 can be set. It is also possible to set the continuation time, which is the criterion of, to be optimal.

Regarding the operation control of the circulation pump, in terms of purification of the bath water, the bath water is constantly circulated by continuous operation,
It is desirable to purify the bath water in good condition. On the other hand, however, it is also desirable to intermittently operate the circulation pump so that the hot water temperature value of the bath water does not exceed the set hot water temperature value even if the purification of the bath water is sacrificed to some extent.

Some users attach great importance to purifying the bath water in a good condition even if the bath water temperature value exceeds the set bath temperature value. Some users attach great importance to the fact that the set hot water temperature value is set properly.

Therefore, the control function of the circulation pump of the present invention can be made to always operate if the heat-retaining condition of the bathroom or the like is satisfied. It is also possible to make the control function a hidden function so that the control function can be switched and selected by a special operation so that only a service person can perform it so as to meet the user's request.

[0023]

As described above, according to the present invention, after the hot water temperature value of the bath water reaches the set hot water temperature value and the heat retention heater is turned off, the rise in the hot water temperature value of the bath water is caused by the circulation pump. Since it is determined whether or not the heat is generated by the heat generation, and when it is determined that the heat is generated by the circulation pump, the heat generation from the circulation pump is reduced by switching the circulation pump from continuous operation to intermittent operation. As in the example, after the bath water reaches the set hot water temperature value, it is possible to prevent the hot water temperature value of the bath water from gradually rising beyond the set hot water temperature value due to the heat generated by the continuous operation of the circulation pump. .

Secondly, since the operation control of the circulation pump is performed by judging whether or not the temperature rise of the bath water temperature value is caused by the heat generation of the circulation pump, the user can, for example, reheat the water. , When the bath water is heated, the hot water temperature rises faster than when the circulation pump generates heat, so the circulation pump does not switch from continuous operation to intermittent operation, and the continuous operation of the circulation pump is preferable. The effect that the bath water can be purified is obtained.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a main part of a control device of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the control device of the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a conventional example of a bath water purifier.

[Explanation of symbols]

 1 Hot Water Temperature Setting Device 2 Storage Device 3 Hot Water Temperature Detection Device 4 Temperature Difference Judgment Device 5 Temperature Difference Stability Judgment Device 8 Circulation Pump 9 Circulation Pump Operating Device

Claims (1)

[Claims] 1. A bath water purifier that circulates and purifies bath water in a bathtub by a circulation pump through a circulation path including a filtration device, a heater for keeping heat, and the like, and sets a hot water temperature value set by a user. A hot water temperature setting device for storing the hot water temperature value in the storage device, a hot water temperature detecting device for detecting the hot water temperature value of the bath water, and a temperature difference between the hot water temperature value and the preset hot water temperature value is a predetermined plus value. A temperature difference determination device that outputs an ON signal when it is within the range of the value of, and a temperature difference stability determination device that determines whether the ON signal output from the temperature difference determination device continues for a predetermined time, And a circulation pump for circulating bath water.
A controller for a circulating pump of a bath water purifying apparatus, characterized in that, when the N signal continues for a predetermined time, the circulating pump is switched from a continuous operation to an intermittent operation via a circulating pump operating device.